/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Returns reference to an array of VertexInstance IDs instanced from this vertex
[TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FVertexInstanceID](API\Runtime\MeshDescription\FVertexInstanceID) > GetVertexVertexInstanceIDs ( const [FVertexID](API\Runtime\MeshDescription\FVertexID) VertexID ) const